Image to Base64 online: free, private, no upload
Encode an image as a Base64 data URI.
How it works
- 1
Drop your image.
- 2
Encode it.
- 3
Copy or download the Base64 text.
Convert images to Base64 text and data URIs for CSS, HTML and JSON. Copy the result or download it as a text file, generated locally in your browser.
Convert images to Base64 text and data URIs for CSS, HTML and JSON. Copy the result or download it as a text file, generated locally in your browser. Images are decoded and processed locally in your browser, so personal photos are never uploaded. Base64 is about 33% larger than the binary image.
What people use it for
- Image to Base64 for websites, social media and email.
- Prepare photos for forms and marketplaces.
- Process personal photos without uploading them.
Tips for best results
- Base64 is about 33% larger than the binary image.
- Keep your original files; results are saved as new copies.
- Batch many images at once to save time.
Your files never leave your device
Unlike most online PDF tools, Intelli File does not upload your documents to a server. Everything runs in your browser using your own device, so contracts, IDs and financial records stay private. Only a small usage counter is sent so we can apply daily limits.
Read how we handle privacyWhat to do next
After this, you may want to Base64 to Image, Compress Image, or Image Converter.
Frequently asked questions
What is a data URI?+
A data URI embeds the image directly in HTML or CSS, e.g. data:image/png;base64,..., saving a request.
Are my files uploaded anywhere?+
No. The conversion runs inside your browser, so your file never leaves your device.
Is it free?+
Free accounts get a few tasks per day; sign up for more, or go Pro for unlimited use and larger files.
Is there a file size limit?+
Files are processed on your device, so the practical limit is your browser's memory. Base64 is about 33% larger than the binary image.
Does it work on my phone?+
Yes. Modern mobile browsers run this tool, although large files are faster on a computer.